docs: def multi_get(self, urls, query_params=None, to_json=True):
          """Issue multiple GET requests.
  
          Args:
              urls - A string URL or list of string URLs
              query_params - None, a dict, or a list of dicts representing the query params
              to_json - A boolean, should the responses be returned as JSON blobs
          Returns:
              a list of dicts if to_json is set of requests.response otherwise.
          Raises:
              InvalidRequestError - Can not decide how many requests to issue.
          """
          return self._multi_request(
              MultiRequest._VERB_GET, urls, query_params,
              data=None, to_json=to_json,
          )